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A308814
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a(n) = Sum_{d|n} n^(d-1).
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6
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1, 3, 10, 69, 626, 7819, 117650, 2097673, 43046803, 1000010011, 25937424602, 743008621405, 23298085122482, 793714780783695, 29192926025441476, 1152921504875286545, 48661191875666868482, 2185911559749718382455, 104127350297911241532842, 5242880000000512000168021
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OFFSET
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1,2
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LINKS
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FORMULA
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MATHEMATICA
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Table[Total[n^(Divisors[n]-1)], {n, 20}] (* Harvey P. Dale, Aug 08 2019 *)
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PROG
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(PARI) {a(n) = sumdiv(n, d, n^(d-1))}
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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